APA Style

Helfrick, A, D., Cooper, W, D. (1990). Modern Electronic Instrumentation and Measurement Techniques (1st Edition). New Delhi: Prentice Hall of India Private Lt..

MLA Style

Helfrick, Albert, D.., Cooper, William, D.. "Modern Electronic Instrumentation and Measurement Techniques". 1st Edition New Delhi: Prentice Hall of India Private Lt., 1990. Text.